The philtrum is the indentation or grove between your nose and your upper lip.

人中是位于鼻子和上唇之间的凹痕或凹陷。

AZUZ : Ten-second trivia: Where would you find the canthus, the glabella and the philtrum?

十秒琐事：你会在哪里找到眼角，眉间或者人中？

The canthus is at the corners of your eyes, the glabella is between your eyebrows and the philtrum is on your upper lip.

眼角在眼睛两侧，眉间在双眉中间，人中在上唇上部。

Children with FAS may also have certain facial characteristics, like small palpebral fissures, which means reduced distance between the two sides of an eye, smooth, or flat philtrum, and a thin vermillion border, which is the border of the lip.

FAS患儿有一定的面部特征，如眼裂短小，即一只眼睛两侧间的距离变短；人中平滑；以及较细的唇红缘（即嘴唇的边界）。